Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/103882
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Type: | Journal article |
Title: | Locating delaminations in laminated composite beams using nonlinear guided waves |
Author: | Soleimanpour, R. Ng, C. |
Citation: | Engineering Structures, 2017; 131:207-219 |
Publisher: | Elsevier |
Issue Date: | 2017 |
ISSN: | 0141-0296 1873-7323 |
Statement of Responsibility: | Reza Soleimanpour, Ching-Tai Ng |
Abstract: | This paper proposes a new method for detecting and locating delaminations in laminated composite beams using nonlinear guided wave. It is shown that when incident wave interacts at the delamination, the nonlinear effect of wave interaction with contact interfaces at the delamination generates higher harmonic guided waves due to contact acoustic nonlinearity (CAN). The proposed method employs a transducer network to detect and locate the delamination using the higher harmonic guided waves. A sequential scan is used to inspect the laminated composite beams by actuating the fundamental anti-symmetric mode (A0) of guided wave at one of the transducers while the rest of the transducers are used for measuring the impinging waves. A series of numerical case studies are performed using three-dimensional explicit finite element simulations, which consider different delamination locations, lengths and through-thickness locations. Experimental case studies are carried out to further validate and demonstrate the capability of the proposed method. The results show that the proposed method is able to accurately detect and locate the delamination in the laminated composite beams using the higher harmonic guided waves. One of the advantages of the proposed method is that it does not rely on baseline data to detect and locate the delamination, and hence, it has less influence by varying operational and environmental conditions. |
Keywords: | Nonlinear guided wave; Contact acoustic nonlinearity; Higher harmonic; Delamination; Laminated composite beam; Baseline-free method; Transducer network |
Description: | Available online 14 November 2016 |
Rights: | © 2016 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.engstruct.2016.11.010 |
Grant ID: | http://purl.org/au-research/grants/arc/DP160102233 |
Published version: | http://dx.doi.org/10.1016/j.engstruct.2016.11.010 |
Appears in Collections: | Aurora harvest 3 Civil and Environmental Engineering publications |
Files in This Item:
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hdl_103882.pdf | Accepted version | 3.49 MB | Adobe PDF | View/Open |
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